Practice 50 Swift String Programming Questions

Practice 50 Swift String Programming Questions

Q1. Write a Swift program to find the length of the string "Hello, Swift!".  
  Input: "Hello, Swift!"  
  Expected Output: 13

Q2. Write a Swift program to convert the string "swift" to uppercase.  
  Input: "swift"  
  Expected Output: "SWIFT"

Q3. Write a Swift program to convert the string "SWIFT" to lowercase.  
  Input: "SWIFT"  
  Expected Output: "swift"

Q4. Write a Swift program to check if the string "apple" starts with the prefix "ap".  
  Input: "apple", "ap"  
  Expected Output: true

Q5. Write a Swift program to check if the string "banana" ends with the suffix "na".  
  Input: "banana", "na"  
  Expected Output: true

Q6. Write a Swift program to concatenate two strings "Hello" and "World".  
  Input: "Hello", "World"  
  Expected Output: "HelloWorld"

Q7. Write a Swift program to replace all occurrences of "e" with "a" in the string "elephant".  
  Input: "elephant", "e", "a"  
  Expected Output: "alaphant"

Q8. Write a Swift program to check if the string "swift" contains the substring "if".  
  Input: "swift", "if"  
  Expected Output: true

Q9. Write a Swift program to split the string "apple,banana,grape" by commas.  
  Input: "apple,banana,grape"  
  Expected Output: ["apple", "banana", "grape"]

Q10. Write a Swift program to reverse the string "hello".  
   Input: "hello"  
   Expected Output: "olleh"

Q11. Write a Swift program to check if the string "radar" is a palindrome.  
   Input: "radar"  
   Expected Output: true

Q12. Write a Swift program to count the number of vowels in the string "education".  
   Input: "education"  
   Expected Output: 5

Q13. Write a Swift program to count the occurrences of the character "a" in the string "banana".  
   Input: "banana", "a"  
   Expected Output: 3

Q14. Write a Swift program to trim whitespaces from the string "   swift   ".  
   Input: "   swift   "  
   Expected Output: "swift"

Q15. Write a Swift program to repeat the string "abc" 3 times.  
   Input: "abc", 3  
   Expected Output: "abcabcabc"

Q16. Write a Swift program to find the index of the first occurrence of "o" in the string "hello".  
   Input: "hello", "o"  
   Expected Output: 4

Q17. Write a Swift program to find the index of the last occurrence of "n" in the string "banana".  
   Input: "banana", "n"  
   Expected Output: 4

Q18. Write a Swift program to extract the substring "swift" from "learn swift programming".  
   Input: "learn swift programming", 6, 11  
   Expected Output: "swift"

Q19. Write a Swift program to check if two strings "abc" and "ABC" are equal (case-insensitive).  
   Input: "abc", "ABC"  
   Expected Output: true

Q20. Write a Swift program to check if the string "swift" is empty.  
   Input: ""  
   Expected Output: true

Q21. Write a Swift program to convert the first letter of "swift" to uppercase.  
   Input: "swift"  
   Expected Output: "Swift"

Q22. Write a Swift program to find the ASCII value of the first character of "A".  
   Input: "A"  
   Expected Output: 65

Q23. Write a Swift program to join the strings "red", "blue", and "green" with a separator "-".  
   Input: ["red", "blue", "green"], "-"  
   Expected Output: "red-blue-green"

Q24. Write a Swift program to replace the first occurrence of "cat" with "dog" in "catapult".  
   Input: "catapult", "cat", "dog"  
   Expected Output: "dogapult"

Q25. Write a Swift program to find the character at index 3 of the string "swift".  
   Input: "swift", 3  
   Expected Output: "i"

Q26. Write a Swift program to count the number of words in the string "hello world swift".  
   Input: "hello world swift"  
   Expected Output: 3

Q27. Write a Swift program to check if the string "abcd" is alphanumeric.  
   Input: "abcd1234"  
   Expected Output: true

Q28. Write a Swift program to format the string "Hello, {name}" by replacing {name} with "John".  
   Input: "Hello, {name}", "John"  
   Expected Output: "Hello, John"

Q29. Write a Swift program to find the Unicode scalar of the character "😄".  
   Input: "😄"  
   Expected Output: 128516

Q30. Write a Swift program to append "world" to "hello".  
   Input: "hello", "world"  
   Expected Output: "helloworld"

Q31. Write a Swift program to find the number of uppercase characters in "Swift Programming".  
   Input: "Swift Programming"  
   Expected Output: 2

Q32. Write a Swift program to find the number of lowercase characters in "Swift Programming".  
   Input: "Swift Programming"  
   Expected Output: 15

Q33. Write a Swift program to check if "hello world" contains only alphabetic characters.  
   Input: "hello world"  
   Expected Output: false

Q34. Write a Swift program to find the longest word in the string "Swift is awesome".  
   Input: "Swift is awesome"  
   Expected Output: "awesome"

Q35. Write a Swift program to replace all spaces in "hello world" with underscores.  
   Input: "hello world"  
   Expected Output: "hello_world"

Q36. Write a Swift program to check if the string "swift" contains the character "z".  
   Input: "swift", "z"  
   Expected Output: false

Q37. Write a Swift program to extract the first word from "Swift programming is fun".  
   Input: "Swift programming is fun"  
   Expected Output: "Swift"

Q38. Write a Swift program to check if the string "swift" has at least one uppercase letter.  
   Input: "swift"  
   Expected Output: false

Q39. Write a Swift program to find the shortest word in the string "I love Swift".  
   Input: "I love Swift"  
   Expected Output: "I"

Q40. Write a Swift program to remove all numeric digits from the string "swift123".  
   Input: "swift123"  
   Expected Output: "swift"

Q41. Write a Swift program to remove all vowels from the string "education".  
   Input: "education"  
   Expected Output: "dctn"

Q42. Write a Swift program to count the number of consonants in the string "programming".  
   Input: "programming"  
   Expected Output: 8

Q43. Write a Swift program to insert "abc" at index 2 of the string "12345".  
   Input: "12345", "abc", 2  
   Expected Output: "12abc345"

Q44. Write a Swift program to extract all numeric digits from the string "a1b2c3".  
   Input: "a1b2c3"  
   Expected Output: "123"

Q45. Write a Swift program to remove the first 3 characters from the string "swift".  
   Input: "swift", 3  
   Expected Output: "ft"

Q46. Write a Swift program to count the number of spaces in the string "hello world swift".  
   Input: "hello world swift"  
   Expected Output: 2

Q47. Write a Swift program to check if "12345" is a numeric string.  
   Input: "12345"  
   Expected Output: true

Q48. Write a Swift program to capitalize the first letter of every word in the string "hello swift world".  
   Input: "hello swift world"  
   Expected Output: "Hello Swift World"

Q49. Write a Swift program to remove the last character from the string "Swift".  
   Input: "Swift"  
   Expected Output: "Swif"

Q50. Write a Swift program to find the number of times "is" appears in the string "This is Swift programming.".  
   Input: "This is Swift programming."  
   Expected Output: 2